Rotary brush



April 19, 1932. R SANZ 1,855,142

ROTARY BRUSH Filed Nov. 1. 1927 TEE.

{W INVENTORI 55W? 4, Q ATTORNEY I Patented Apr. 19, 1932 UNITED STATES RICARDO SANZ, "OF NEW YORK, N. Y.

ROTARY BRUSH Application filed November This invention relates to the manufacture of litharge and red lead (orange) by electrolysis, and has among its objects to produce products of good quality and high covering 5, power. In carrying out this invention process applicant makes use of a special oven invented by himself. The products made by the methods disclosedin this application will not form sediments when mixed with oil.

According to the invention the litharge and red lead-are the result of the oxidation of a lead carbonate, by means of the above mentioned oven. The lead carbonate is obtained by an electrolytical process, as follows Sheets of lead are submerged in a regular tank provided with a catalytic bath, and these sheets are connected to act as anodes, while other sheets of alloy lead connected to act as cathodes, these sheets being regularly spaced. Electric current flowing between these sheets, decomposes the anodes into very fine particles which areprecipitated at the bottom of the tank due to absorption of carbonic acid gas, which is added continuously to the catalytic bath.

The lead carbonate in suspension in the catalytic liquid iscarried automatically to a deposit to be poured off, and the sedimented lead carbonate is carried to a vacuum filter where it takes the form of a hard paste. From the filter this paste falls into another deposit where it is diluted and washed with water. Afterwards thewater is poured off and the sedimented substance, clean lead carbonate is carried to a drum heated with steam, where it is'dried, and ground very finely by means of long knivesin contact with the rotating drum.

After this operation the lead carbonate (already powder) is conveyed by means of an endless belt, and poured into the upper entrance of an oven to be heated to a required temperature, the litharge being preferably heated to 320 centigrade, and the red lead (orange) to 600 centigrade.

For further comprehension of the invention, and of the objects and advantagesthereof, reference will behad to the following description and accompanying drawings,

1, 1927. Serial No. 230,369.

and to the appended claims in which the various novel features of the invention are more particularly set forth.

Referring to the accompanying drawings, forming a material part of this disclosure Fig. Its a perspectiveview .of an oven constructed according to this invention.

Fig. 2 is a vertical sectional view thereof.

Fig. 3 is a fragmentary enlarged detailed sectional view of'a portion of Fig. 2.

The reference numeral 10 indicates gen-' erally a square oven of about three meters in height, and two meters wide, and provided with a top entrance l1 and a bottom exit 12. Two horizontal partitions 13 are secured within the oven, and each partition has a flood gate 14, which can be closed and opened at will, by means of levers 15 to provide communication between the chambers formed by the partitions, and also to the exit 12.

Heating means 16 are secured within the oven, and heat therefrom may circulate to the central chamber or top chamber of the oven thru the adjustable grates 13, and the top chamber is heated to 300 C, and the adjacent lower chamber to 600 (3., thermometers 17 being provided for measuring the temperatures. The oven is provided with a chimney 28. Lead carbonate entered within the top chamber is oxidized and transformed into red lead (orange), and is next passed to the adjacent lower chamber, and oxidation is here perfected.

A top auxiliary chamber 13 is filled through the entrance 11 by means of a lift 18, or other auto-mechanical means. An electric motor 19 is connected with a vertical shaft '20 provided with distributing metal tooth brushes 21 in auxiliary chambers 13 and 13 to continuously and mechanically mix products within these chambers, and when the top flood gate 14 is opened the substance in the auxiliary chamber 13 is passed thru chute 21 to the next lower auxiliary chamber that is chamber 13*. When the second flood gate, from the top, is openedthe substance in auxiliary chamber 13 is passed to'the exit 12, on to lift 22 which takes it to a wrapping machine 23. The auxiliary chambers 13 and 13 have air pressurepipes 24 connected therewith to supply air to these chambers. The distributing metal tooth brushes 21 have pivoted teeth 25 connected at their tops to a flexible Wire 26 guided to the exterior of the oven thru a central aperture in shaft 20 and terminating in a knot 27 so that when this knot is pulled the teeth are moved to aid in forcing substances thru the flood gates 14.

The manufacture of the litharge is the same as the red lead with the difference that the oven is heated till 320 C. only instead of 600 C.

While I have above described the preferred form, construction and arrangements of the several elements employed, it will be understood that the device is, nevertheless susceptible ofconsiderable modification there- 'in, and I therefore reserve the privilege of resorting to all such changes as may be fairly embodied Within the spirit and scope of the invention as claimed.

Having thus described my invention, what I claim as new, and desire to secure by United States Letters Patent is A rotary brush, comprising a hollow shaft, arms perpendicularly extending from said shaft, teeth pivotally mounted intermediate of their ends and normally perpendicularly depending from said shaft, anda flexible wire connected to the top end of the teeth, said teeth being pivoted upon the drawing of the wire.

In testimony whereof I have affixed my signature.

RICARDO SANZ. 

